The 2N5401RUBx from STMicroelectronics is a RF Transistor with Duty_Cycle 0.015, Gain 20 to 240 dB(DC Current Gain), Voltage - Collector Base (Vcbo) 160 V, Voltage - Collector Emitter (Vceo) 150 V, Voltage - Emitter Base 5 V. Tags: Surface Mount. More details for 2N5401RUBx can be seen below.